/*
 * Copyright (C) 2018-2020. Huawei Technologies Co., Ltd. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.hetu.core.plugin.heuristicindex.datasource.base;

import io.prestosql.spi.heuristicindex.DataSource;

/**
 * Does nothing.
 * <p>
 * This was added to help with testing.
 *
 */
public class EmptyDataSource
        implements DataSource
{
    private static final String ID = "EMPTY";

    @Override
    public String getId()
    {
        return ID;
    }

    @Override
    public void readSplits(String schema, String table, String[] columns, String[] partitions, Callback callback)
    {
    }
}
